Malicious PDF — malware analysis report

Static analysis result for SHA-256 324d0bae919f259b…

MALICIOUS

PDF

94.6 KB Created: 2020-11-25 21:34:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9695284ad569fd0ed163721dd01dcdf8 SHA-1: 1aa2ea2e9983ea924d1e970a294901f70ed13af0 SHA-256: 324d0bae919f259b952797eb2b75b9a402d3c929bf3a34ca919b7601ac565b8b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffking.ru/strik?utm_term=characteristics+of+democracy+and+dictatorship
    • https://bokasaveti.weebly.com/uploads/1/3/4/7/134725866/budesoje.pdf
    • https://mefinijusigoti.weebly.com/uploads/1/3/4/4/134499215/zidekakoruremelew.pdf
    • https://biwawabagukolaz.weebly.com/uploads/1/3/4/7/134730268/zozuxugufobewaj_puderitesajob_jafuz.pdf
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/261e5a9c3e.pdf
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/pozitamedi.pdf
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/5644f9eb0f27e.pdf
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/fugazeromeg-wanosasiw-wiligisovipa.pdf
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/zenolari_zumef_pogirixis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kosipefojaw/king_of_thorn_anime_movie.pdf
    • https://s3.amazonaws.com/vazisi/australian_manufacturing_industry_report.pdf
    • https://s3.amazonaws.com/fotojipifuzitul/astragalus_membranaceus.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001373a.bin
f395e84e6eb9e3c61a3a7d4c5dfc06ac11c454b4d3b06faf92651554e20dff8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1373A 5368 bytes
font_01_sfnt_off00014958.bin
15639037fdba31aa8491b6d75a45803c526baea1f7fdd2216ae5823612b3c163		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14958 10788 bytes

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